If you get the message “unhandled exception hexadecimal value 0x00, is an invalid character. Line 1, position 1”, then this is most likely a corruption in one of the data files that are used to save information:

The solution is to delete some files on your PC.

To do this, you have to navigate to a specific Folder on your PC. The Screen Shots below will show you what to do:

First Open your Windows Explorer (the one you use to locate Files on your PC). Then:

Then, if you are using NinjaTrader:

Or if you are using the Stand-alone version: